Dear matplotlib users,

I am trying to plot a nxn symetric matrix containing zeros (in white) and ones (in black). Quite simple, I guessed. For that I use imshow as follows:

>>> imshow(W, cmap=cm.binary) # W is a Numpy Array with shape (100,100)

However, this does not work the way i would like (the ones appear very blur). I would need the correct representation of a grid where the possition 0,0 is simply the entry W[0,0] of my array.

There should be an easy way to plot this matrix, bu I cannot figure it out.

Thanks for your help in advance.

Jose
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